# Superlux HD 668B
See [usage instructions](https://github.com/jaakkopasanen/AutoEq#usage) for more options and info.

### Parametric EQs
You can use filters 1-5 or 1-10. Apply preamp of -6.8 dB or -6.8 dB, respectively.

|   # | Type      |   Fc (Hz) |    Q |   Gain (dB) |
|-----|-----------|-----------|------|-------------|
|   1 | LowShelf  |       105 | 0.7  |         7.1 |
|   2 | Peaking   |        81 | 1.02 |        -5.8 |
|   3 | Peaking   |       689 | 0.65 |         3.2 |
|   4 | Peaking   |      2067 | 2.46 |        -3.8 |
|   5 | Peaking   |      6096 | 4.51 |       -10.4 |
|   6 | Peaking   |      4773 | 2.54 |         4.9 |
|   7 | Peaking   |      5602 | 6    |        -5.9 |
|   8 | Peaking   |      6159 | 4.41 |         2.7 |
|   9 | Peaking   |      8184 | 2.79 |        -1.4 |
|  10 | HighShelf |     10000 | 0.7  |        -7.7 |

### Fixed Band EQs
When using fixed band (also called graphic) equalizer, apply preamp of **-8.1 dB** (if available) and set gains manually with these parameters.

|   # | Type    |   Fc (Hz) |    Q |   Gain (dB) |
|-----|---------|-----------|------|-------------|
|   1 | Peaking |        31 | 1.41 |         8   |
|   2 | Peaking |        62 | 1.41 |         0.4 |
|   3 | Peaking |       125 | 1.41 |        -1.7 |
|   4 | Peaking |       250 | 1.41 |         0.3 |
|   5 | Peaking |       500 | 1.41 |         2.3 |
|   6 | Peaking |      1000 | 1.41 |         3.5 |
|   7 | Peaking |      2000 | 1.41 |        -4   |
|   8 | Peaking |      4000 | 1.41 |         2.7 |
|   9 | Peaking |      8000 | 1.41 |        -6   |
|  10 | Peaking |     16000 | 1.41 |       -12   |

### Graphs
![](./Superlux%20HD%20668B.png)
